My fellow web sleuths, I managed to get in contact with Shawn Cohen last night on the phone. The first question I asked him was "Did ZC live in Tenth & College or Tenth & College Village?" He seemed unfamiliar with the distinction in names. (In his defense, he didn't have his notes in front of him, and he's busy working on another story now.) But he said, facing "up hill" (north), it was the one "to the left". So, based on that, you are absolutely right, Ixchel13, "apartment at 10th & College", or whatever he said on the video was (slightly) misleading: Mr. Cohen was, in fact, referring to Tenth & College Village, according to him, on the phone with me last night.
This explains the PIs seeming to have footage of CR carrying Lauren away from ZC's door. Shawn Cohen wasn't sure, but he said he believed that said description was based on video, not a witness. So, CR and Lauren must have ducked into T&CV, as you suspected, then continued down the alley, getting caught on camera, for the last time, as they left the alley at 2:51. Three minutes still strikes me as quick to even duck in, and still get down the alley, with all the stumbling. But, maybe the 2:48 time is when she *re-entered* the alley, after the failed visit to ZC. That would make the time more believable.
Mr. Cohen didn't, off of the top of his head, have information about which of Lauren's possessions were found in the alley, vs at Smallwood. I brought up Gatto's 3:38 witness. He seemed as if he hadn't ever seriously considered the 3:38 time as being accurate. He said he was never able to interview the 3:38 witness, but that he'd like to. I argued for the theory that Lauren wandered away from 5N at 3:30, and was taken into Tenth & College at 3:38, after being seen by the bar worker.
I expressed suspicion that a group of run-of-the-mill partiers would spontaneously hide a body, or hide it this well. SC, on the other hand, thought it possible that a group might hide a body, due to an overdose, and that such a body might not be found for a long time. It was exciting to talk to someone so close to the actual investigation.
Speaking of Gatto, I can't find an e-mail for Tony Gatto anywhere. Does anyone have an idea how I could get an e-mail to him? I want to ask him about the bar-worker witness.